Tellurian-globe



(No Model.) 2 Sheets-Sheet 1. T. H. COSTELLO.

TELLURIAN GLOBE.

No. 317,307. Patented May 5, 1885.

JViL nesse (No Model.) 7 2 Sheets-Sheet 2.

T. H. COSTELLO. TELLURIAN GLOBE.

No. 317,307. v Patented May 5, 1885.

mt neyses: v ,Tmven0'r':

UNITED STATES PATENT OFFICE.

THOMAS H. COSTELLO, OF CHICAGO, ILLINOIS.

TELLURiAN-GLOBE.

SPECIFICATION forming part of Letters Patent No. 317,307, dated May 5, 1885.

Application filed March 14, 1884.

To all whom it may concern.-

Be it known that I, THOMAS H. CosrELLo, residing at Chicago, in the county of Cook and State of Illinois, and a citizen of the United States, have invented new and useful Improvements in Tellurian-Globes, of which the following is a full description, reference being had to the accompanying drawings, in which Figure 1 is a side elevation. Fig. 2 is a front elevation, the position of some of the parts being changed. Figs. 3 and 4 are enlarged details. Fig. 5 shows a modification.

The leading objects of my improvements are to simplify the construction of tellurian-globes and dispense with gearing, wheels, and bands, and at the same time to provide for making the various illustrations usually given by means of a tellurian, which I accomplish by the mechanism illustrated in the accompany ing drawings, in which- A represents a support which will be provided with acalendar-index made and divided in the usual manner.

S is a pointer.

As shown, the support A is provided with hooks a,' by means of which it can be hung upon a wall or any other suitable place.

B is a rotatable bar, which, as shown, is round, and it is pivoted near its center upon a post or pivot, b, which projects from the center of the support A, and passes preferably through an enlargement of the bar, as best illustrated in Fig. 4.

c is a friction spring-washer fitting upon the pin I), and having a projection, d, which enters a groove, o, in the pin 1), which prevents the washer from turning.

e is a thumb-screw upon the end of the post b, which is screw-threaded.

One end of the bar B is provided with a long bearing, f, in which is supported a short shaft, 9, which can rotate in its bearing. The other end of the bar B is provided with asimilar bearing, f, and shaft 9. Both of these shafts are prevented from slipping outof place in any well-known manner.

0 is a globe which is supported upon a pivot or axis upon the inclination-plate h, which axis stands at the usual inclination. The other end of the plate his provided with a socket (N0 model.)

which fits upon the projecting end of the shaft 9, to which it is secured by a thumb-screw, t.

i is a piece of metal fitting upon the other end of the shaft 9, to which it can be fastened by a thumb-screw.

IV is a weight suspended from the parti by means of a short rod, as shown.

D is a circle of illumination, and E a twilight-circle encircling the globe, as shown, and supported by means of arms j, which are secured to the arm 76, which is adjustably secured by means of a thumbscrew to a projection, Z, from the end of the bar B.

m represents the equator; a, the ecliptic; and o the artic circle.

1 is a pointer, which may be and preferably is attached to the portion 0 of the globe G.

F is designed to represent the suns vertical rays. It is removably connected to a suitable support, 19, upon the bar B.

q is apointer.

In Fig. 1 I have shown the moon G- connected with the shaft 9, as indicated by dot ted lines. Then the moon is used, the part F is to be removed from p and placed upon the support H, which is secured to the calendar'index, the position of F when so used being indicated in Fig. 1 by dotted lines.

WV is a weight depending from one end of the shaft 9, and connected therewith by means of the piece 43 and a thumb-screw.

If the support A and index were placed upon a table, as is customary, instead of being hung upon the wall, the globe and circles of illumination and twilight would be seen mounted in the usual position, the sun then being at one side of the globe, instead of over it, as in the drawings.

As shown in Fig. 1, in which the tellurian is represented in the position it would hear when suspended upon a wall, the position of the globe relative to the sun is that which it occupies in midsummer, the pointer q being over the ecliptic. If the bar B be now rotated upon its axis, the shaft 9 will be prevented from rotating in its bearing f by the action of the weight W, which holds the plate h in a perpendicular position; but the bearing will r0- tate upon the shaft 9, and at the same time the earth will rotate upon its axis. WVhen onefourth of a revolution has been made, the parts will be brought into the position shown in Fig. 2. The rotation can be continued at pleasure until a complete revolution is made, the earth being brought into the positions which it occupies relative to the sun in different seasons, the same as with the ordinary tellurian.

The parts should be so constructed that the weight of the devices upon the two sides of the post I) will be about balanced. Then by means of the thumbscrew c the friction of the washer can be adjusted so that the parts will remain in any position in which they may be placed without interfering with the rotation of the bar B. This bar is to be rotated by hand.

Thus far in the description of the operation the moon is supposed to be removed from its support and the part F to be upon its support 1).

The moons phases can be illustrated by placing the moon upon the shaft 9, at the same time placing F upon the support H and rotating the bar B, as before.

Instead of supporting the part F upon H, it may be removed, and any suitable object may be supposed to be the sun.

The illustrations which can be given by the use of this globe are substantially the same as those given by tellurians in common use, and they need not be particularly described.

If it is not desired to provide for illustrat ing the moons phases, the bearing f and shaft 9 and weight WV may be omitted, a per manent weight being cast upon or secured to the bar B to counterbalance the weight of the globe and weightlV. The weight \V operates in the same manner as the weight W, and prevents rotation of the shaft 9 in its bearing when the bar B is rotated.

I do not limit myself to the means shown for connecting the weights W W with the shafts g y, it only being important that the weights be so connected with the shafts as to prevent them from rotating in their bearingsff.

It will be observed that the inclination-plate h is constantly held in a perpendicular position while the bar B rotates upon its axis.

I do not limit myself to the exact means above described for holding the inclination plate It in a perpendicular position while the bar B rotates, and have shown one modification in Fig. 5 in which a is a globe support rigidly secured to the bar B.

a is a socket to which the inclination-plate h is connected, in which socket a the support 20 rotates, and W is a weight depending from the socket a. In this case the support k, which carries the circles of illumination and twilight, is carried somewhat lower than in Fig. 1, for the purpose of providing room for the weight between the socket a and the support k. By this construction the same results will be produced as by the form shown in Fig. 1.

'What I claim as new, and desire to secure by Letters Patent, is as follows:

1. The combination of a support, A, a bar pivoted upon such support and provided at one end with a globe-support, and a globe mounted on an inclination-plate, and a weight to hold the inclination-plate in a perpendicular position while the bar B rotates on its axis, substantially as and for the purposes specified.

2. In a tellurian, the combination of a rotating bar, B, having at each end a bearing f or a short shaft, short shafts supported in such bearings, and weights to prevent the rotation of such shafts in their bearings, substantially as and for the purposes specified 3. In a tellurian, the combination of a sup port, A, a rotating bar, B, a globc-support at one end of such bar, a pivotal moon-support at its other end, and a sun-support, H, substantially as and for the purposes specified.

THOMAS H. GOTELLO.

Witnesses:

E. A. Wnsr, ALBERT H. ADAMS. 

